1. Figure 6.18 shows a three-speed motorcar gearbox. The input shaft with pinion A transmits 100 kW at 1600 r/min. Pinion A drives gear wheel B on the lay shaft which also carries the gears E and C for first gear, wheel D meshes with C and for second gear wheel E meshes with F. The input and output shafts are coaxial and are coupled direct for third gear. The module for wheels A and B is 6 mm and the shaft center distance is 207 mm. The speed ratio between input and lay shaft is 16 7 1.1 Determine the numbers of teeth for gear wheels A and B 1.2 If the module for gear wheels C and D is more than 6 but less than 10, and the overall speed ratio for first gear is to be exactly 32 9, determine the numbers of teeth for gears C and D 1.3 If the module for gears E and F is to be the same as for gears C and D and the overall gear ratio for second gear is exactly 16 7, calculate the numbers of teeth for gears E and F. 1.4 Calculate the torque transmitted by the lay shaft in the first gear B E C 207